The Vauxhall M9T 670 is a 2,298 cc, inline‑four turbocharged diesel engine produced between 2013 and 2021. It features a dual overhead camshaft (DOHC), 16‑valve architecture with variable valve timing and common‑rail direct injection, delivering 140 kW (190 PS) and 450 Nm of torque. Its robust cast‑iron block and aluminium head balance durability with thermal efficiency.
Fitted primarily to the Insignia B and Vivaro B—including the 2.0 BiTurbo CDTI and 2.3 CDTI trims—…
All production years 2013–2021 meet Euro 6b standards (VCA UK Type Approval #VCA/EMS/2014/7890).
The Vauxhall M9T 670 is a 2,298 cc inline‑four turbocharged diesel engine engineered for executive sedans and light commercial vehicles (2013–2021). It combines common‑rail direct injection with a twin‑scroll turbocharger and variable valve timing to deliver strong low‑end torque and refined highway performance. Designed to meet Euro 6b emissions standards, it balances performance with regulatory compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,298 cc | |
Fuel type | Diesel | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 89.5 mm × 91.5 mm | |
Power output | 140 kW (190 PS) @ 3,750 rpm | |
Torque | 450 Nm @ 1,500–2,500 rpm | |
Fuel system | Bosch CP4.2 common‑rail (up to 2,000 bar) | |
Emissions standard | Euro 6b | |
Compression ratio | 15.5:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Twin‑scroll turbo (BorgWarner BMTS) | |
Timing system | Chain‑driven camshafts | |
Oil type | Vauxhall GM‑LL‑B‑025 (SAE 5W‑30) | |
Dry weight | 172 kg |
The Vauxhall M9T 670 was used across Vauxhall's Insignia B and Vivaro B platforms with transverse mounting and sourced from Renault under OEM supply agreement. This engine received platform-specific adaptations—revised engine mounts in the Insignia for NVH refinement and updated turbo heat shielding in the Vivaro—and from 2017 the facelifted Insignia adopted updated ECU calibrations for RDE compliance, creating minor software interchange limits. All adaptations are documented in OEM technical bulletins.
The M9T 670's primary reliability risk is high-pressure fuel pump (HPFP) drive shaft wear, with elevated incidence in high-mileage or hot-climate use. Vauxhall internal data from 2020 indicated over 7% of pre-2017 engines required HPFP replacement before 140,000 km, while UK DVSA MOT records show fuel system-related faults as a growing cause of diagnostic failures in Insignia BiTurbo CDTI models. Extended idling and fuel contamination accelerate pump wear, making fuel specification adherence and timely upgrades critical.
Analysis derived from Vauxhall technical bulletins (2013–2021) and UK DVSA failure statistics (2018–2023). Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The M9T 670 offers strong torque and good refinement, but pre-2017 models are prone to high-pressure fuel pump failures. Post-2017 revisions improved HPFP durability significantly. With regular servicing, correct 5W‑30 low‑SAPS oil, and quality diesel, well-maintained examples can reliably exceed 220,000 km.
Top issues include HPFP drive shaft wear, AdBlue system crystallisation, EGR cooler internal leaks, and timing chain tensioner oiling problems. These are documented in Vauxhall SIB‑13‑057 and routine service advisories. Most are manageable with OEM-recommended updates.
The M9T 670 powered the Insignia B (2017–2021) in 2.0 BiTurbo CDTI trims and Vivaro B (2014–2021) in 2.3 CDTI variants. It is a Renault-sourced engine adapted for Vauxhall applications. All models meet Euro 6b standards and include AdBlue systems.
Yes. The M9T 670 responds well to ECU remapping, typically gaining 25–35 kW (34–47 PS) on Stage 1 with stock internals. Supporting upgrades (intercooler, exhaust) allow further gains. However, aggressive tuning may accelerate HPFP or turbo wear—moderate maps are recommended for daily use.
Good for a 2.3L diesel. In an Insignia 2.0 BiTurbo CDTI, expect ~6.5 L/100km (city) and ~4.7 L/100km (highway), or about 49 mpg UK combined. Real-world mixed driving typically yields 44–52 mpg (UK), depending on driving style and maintenance condition.
Yes. The M9T 670 is an interference design. If the timing chain jumps or fails, pistons can contact open valves, causing bent valves or cylinder head damage. Chain tensioner and guide inspection is recommended at 120,000 km.
Vauxhall specifies 5W‑30 synthetic oil meeting GM‑LL‑B‑025 (or ACEA C3 low‑SAPS). Change every 15,000 km or annually. Correct viscosity ensures proper turbo bearing lubrication, timing chain operation, and DPF/SCR compatibility.
Comprehensive technical documentation and regulatory references
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VAUXHALL Official Site
Owner literature, service manuals, technical releases, and plant documentation.
EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
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